<template>
  <div style="display: flex">
    <div style="width:50% height:100vh" class="tagcloud-left">
      <fytitles v-if="earthData" :g="earthData" />
      <div class="vif" v-else></div>
    </div>
    <div class="tagcloud-right">
      <div class="tagcloud-all" ref="tagcloudall" @click="infClick">
        <a @click="dianji(item.B_kind)" v-for="(item, index) in tagList" :key="index" class="judge"
          rel="external nofollow" :style="'color:' + item.color + ';top: 0;left: 0;filter:none;'">{{ item.B_kind }}</a>
      </div>
    </div>
  </div>
</template>

<script>
import Fytitles from "./Fytitles.vue";
export default {
  components: { Fytitles },
  mounted() {
    // console.log(this.$emit(custom,22222222222222))
    // getClour().then(data => {
    //     console.log(data)
    // })
    this.update();
  },
  data() {
    return {
      earthData: null,
      tagList: [],
      radius: 210,
      dtr: Math.PI / 2500,
      d: 1800,
      mcList: [],
      active: false,
      lasta: 1,
      lastb: 1,
      distr: true,
      tspeed: 10,
      size: 50,
      mouseX: 0,
      mouseY: 0,
      howElliptical: 1,
      oList: [],
      oA: [],
      sa: 0,
      ca: 0,
      sb: 0,
      cb: 0,
      sc: 0,
      cc: 0,
    };
  },
  methods: {
    // 地球接口点击请求数据
    dianji(name) {
      // console.log(name);
      let url = "/index/global_search?kind=" + name;
      this.axios(url).then((res) => {
        // console.log(res);
        this.earthData = res.data;
      });
    },
    infClick(e) {
      if (e.target.className == "judge") {
        // console.log(e.target.className)
        this.$emit("custom", e.target.innerHTML);
      }
    },
    // 生成随机数
    getRandomNum() {
      return Math.floor(Math.random() * (255 + 1));
    },
    // 三角函数角度计算
    sineCosine(a, b, c) {
      this.sa = Math.sin(a * this.dtr);
      this.ca = Math.cos(a * this.dtr);
      this.sb = Math.sin(b * this.dtr);
      this.cb = Math.cos(b * this.dtr);
      this.sc = Math.sin(c * this.dtr);
      this.cc = Math.cos(c * this.dtr);
    },
    // 设置初始定位
    positionAll() {
      this.$nextTick(() => {
        // 注意: 所有的在onReady方法中执行的方法都需要$nextTick确保所有的标签都已经渲染
        var phi = 0;
        var theta = 0;
        var max = this.mcList.length;
        var aTmp = [];
        var oFragment = document.createDocumentFragment();
        // 随机排序
        for (let i = 0; i < this.tagList.length; i++) {
          aTmp.push(this.oA[i]);
        }
        aTmp.sort(() => {
          return Math.random() < 0.5 ? 1 : -1;
        });
        for (let i = 0; i < aTmp.length; i++) {
          oFragment.appendChild(aTmp[i]);
        }
        this.oList.appendChild(oFragment);
        for (let i = 1; i < max + 1; i++) {
          if (this.distr) {
            phi = Math.acos(-1 + (2 * i - 1) / max);
            theta = Math.sqrt(max * Math.PI) * phi;
          } else {
            phi = Math.random() * Math.PI;
            theta = Math.random() * (2 * Math.PI);
          }
          // 坐标变换
          this.mcList[i - 1].cx = this.radius * Math.cos(theta) * Math.sin(phi);
          this.mcList[i - 1].cy = this.radius * Math.sin(theta) * Math.sin(phi);
          this.mcList[i - 1].cz = this.radius * Math.cos(phi);
          this.oA[i - 1].style.left =
            this.mcList[i - 1].cx +
            this.oList.offsetWidth / 4 -
            this.mcList[i - 1].offsetWidth / 4 +
            "px";
          this.oA[i - 1].style.top =
            this.mcList[i - 1].cy +
            this.oList.offsetHeight / 4 -
            this.mcList[i - 1].offsetHeight / 4 +
            "px";
        }
      });
    },
    // 坐标更新 让标签动起来
    update() {
      this.$nextTick(() => {
        // 注意: 所有的在onReady方法中执行的方法都需要$nextTick确保所有的标签都已经渲染
        var a;
        var b;
        if (this.active) {
          a =
            (-Math.min(Math.max(-this.mouseY, -this.size), this.size) /
              this.radius) *
            this.tspeed;
          b =
            (Math.min(Math.max(-this.mouseX, -this.size), this.size) /
              this.radius) *
            this.tspeed;
        } else {
          a = this.lasta * 0.98;
          b = this.lastb * 0.98;
        }
        this.lasta = a;
        this.lastb = b;
        if (Math.abs(a) <= 0.01 && Math.abs(b) <= 0.01) {
          return;
        }
        var c = 0;
        this.sineCosine(a, b, c);
        for (var j = 0; j < this.mcList.length; j++) {
          var rx1 = this.mcList[j].cx;
          var ry1 = this.mcList[j].cy * this.ca + this.mcList[j].cz * -this.sa;
          var rz1 = this.mcList[j].cy * this.sa + this.mcList[j].cz * this.ca;
          var rx2 = rx1 * this.cb + rz1 * this.sb;
          var ry2 = ry1;
          var rz2 = rx1 * -this.sb + rz1 * this.cb;
          var rx3 = rx2 * this.cc + ry2 * -this.sc;
          var ry3 = rx2 * this.sc + ry2 * this.cc;
          var rz3 = rz2;
          this.mcList[j].cx = rx3;
          this.mcList[j].cy = ry3;
          this.mcList[j].cz = rz3;
          var per = this.d / (this.d + rz3);
          this.mcList[j].x =
            this.howElliptical * rx3 * per - this.howElliptical * 2;
          this.mcList[j].y = ry3 * per;
          this.mcList[j].scale = per;
          this.mcList[j].alpha = per;
          this.mcList[j].alpha = (this.mcList[j].alpha - 0.6) * (10 / 6);
        }
        this.doPosition();
        this.depthSort();
      });
    },
    //
    doPosition() {
      this.$nextTick(() => {
        // 注意: 所有的在onReady方法中执行的方法都需要$nextTick确保所有的标签都已经渲染
        var l = this.oList.offsetWidth / 2;
        var t = this.oList.offsetHeight / 2;
        for (var i = 0; i < this.mcList.length; i++) {
          this.oA[i].style.left =
            this.mcList[i].cx + l - this.mcList[i].offsetWidth / 4 + "px";
          this.oA[i].style.top =
            this.mcList[i].cy + t - this.mcList[i].offsetHeight / 4 + "px";
          this.oA[i].style.fontSize =
            Math.ceil((12 * this.mcList[i].scale) / 2.5) + 8 + "px";
          // this.oA[i].style.filter = "alpha(opacity=" + 100 * this.mcList[i].alpha + ")";
          this.oA[i].style.opacity = this.mcList[i].alpha;
        }
      });
    },
    //
    depthSort() {
      this.$nextTick(() => {
        // 注意: 所有的在onReady方法中执行的方法都需要$nextTick确保所有的标签都已经渲染
        var aTmp = [];
        for (let i = 0; i < this.oA.length; i++) {
          aTmp.push(this.oA[i]);
        }
        aTmp.sort(function (vItem1, vItem2) {
          if (vItem1.cz > vItem2.cz) {
            return -1;
          } else if (vItem1.cz < vItem2.cz) {
            return 1;
          } else {
            return 0;
          }
        });
        for (let i = 0; i < aTmp.length; i++) {
          aTmp[i].style.zIndex = i;
        }
      });
    },
    // 网络请求 拿到tagList
    query() {
      let url = "/index/global";
      this.axios(url).then((res) => {
        // console.log(res);
        this.tagList = res.data.data
          .concat(res.data.data)
          .concat(res.data.data);
        this.onReady();
      });
      // 假装从接口拿回来的数据
      // let tagListOrg = [
      //   { name: "标签1" },
      //   { name: "标签2" },
      //   { name: "标签3" },
      // ];
      // this.tagList = tagListOrg;
      // this.onReady();
    },
    // 生成标签云
    onReady() {
      this.$nextTick(() => {
        this.oList = this.$refs.tagcloudall;
        this.oA = this.oList.getElementsByTagName("a");
        var oTag = null;
        for (var i = 0; i < this.oA.length; i++) {
          oTag = {};
          oTag.offsetWidth = this.oA[i].offsetWidth;
          oTag.offsetHeight = this.oA[i].offsetHeight;
          this.mcList.push(oTag);
        }
        this.sineCosine(0, 0, 0);
        this.positionAll();
        this.oList.onmouseover = () => {
          this.active = true;
        };
        this.oList.onmouseout = () => {
          this.active = false;
        };
        this.oList.onmousemove = (event) => {
          var oEvent = window.event || event;

          this.mouseX =
            oEvent.clientX -
            (this.oList.offsetLeft + this.oList.offsetWidth / 4);
          this.mouseY =
            oEvent.clientY -
            (this.oList.offsetTop + this.oList.offsetHeight / 4);
          this.mouseX /= 1;
          this.mouseY /= 1;
        };
        setInterval(() => {
          this.update();
        }, 30); // 定时器执行 不能写setInterval(this.update(), 30)
      });
    },
  },
  created() {
    this.$nextTick(() => {
      this.query();
    });
  },
};
</script>

<style lang="scss">
.tagcloud-left {
  width: 50%;
  height: 100vh;

  .vif {
    position: relative;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 32rem;
    height: 28rem;
    max-width: 40rem;
    max-height: 40rem;
    border-radius: 10px;
    // background-color: rgba(253, 253, 253, 0.767);
    background-image: url("../assets/地球美食详情.jpg");
    background-size: cover;
    padding: 20px;
  }
}

.tagcloud-right {
  width: 50%;
  height: 100vh;

  .tagcloud-all {
    width: 100%;
    height: 100%;
    position: relative;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);

    a {
      position: absolute;
      top: 0px;
      left: 0px;
      color: #fff;
      font-weight: bold;
      text-decoration: none;
      padding: 3px 6px;

      &:hover {
        color: #d4d0d0c5;
        // letter-spacing: 2px;
      }
    }
  }
}
</style>
